I've participated in a number of Hackthons over the years. Almost always using technologies from the Microsoft stack including ASP.NET MVC, Xamarin, UWP and IOT Core.
I developed a website that allows users to create and manage virtual bookshelves including lookups to the Amazon eCommerce API.
I developed a prototype for an iPhone app (Xamarin) to show progress of people on their way home on a map.
Developed a Unity first person shooter
I developed a prototype for a voice controlled browser using UWP/C# and demonstrated it running on Windows Phone, IOT Core, tablet and laptop.
This year I developed a tongue in cheek website for putting celebrities in your very own prison.
With the theme of this Hackathon being 'Open Data', I developed a version of SlideShare for Charts.
This year I attended with a team from Kitbag and we developed a website that showed what each team/person was currently working on. Used Signal-R.
I developed an online tool for validating and formatting Xml strings.
This year I wanted to develop something that would analyse website/page structures and report on issues, and make recommendations.
Being a Lego fan and purchasing a Surface RT device, I wanted to develop an app for it. The free app went on to have over 3000 downloads.
I forget the year and lost the blog post but remembering building a responsive (mobile first) web app where people could report middle lane drivers to the website and see previous reports on the map.
I forget the year and lost the blog post however I built a text recognition app for Windows Phone that called the Majestic API to get url quality scores and provide a preview of that url.